Quote:
Originally posted by Mael
people haven't known that for 1000's of years. that knowledge may have been around for 1000 years at most. ancient rome and greece, the ancient arabs, none of them knew. if i'm wrong about this and you have some credible info proving so, please link it. thanks.
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Actually he is right. It can be proven with a reasonably siple geometrical excercise, by measuring the distance to an object that is just barely visible on the horizon, or noticing that when watching a ship appear on the horizon it is the mast that appears first, as if it were coming over a hill.
Anyway, for how long it has been know is inconsequental to the argument.